usb-hub/gnss-init: handle releasing resets at power-up and reboot
start-up changes:
- usb-hub is just released from reset
- gnss-init service calls a script twice:
- as pre-step: checking the hub state depending on the start
reason:
- at reboot --> just go on, at power-up
- at power-up --> wait for a USB disconnect
of a device for a certain
time
- as start step: releasing gnss module from reset
shutdown changes:
- no resets were triggered
BugzID: 72787
Signed-off-by: Marc Mattmueller <marc.mattmueller@netmodule.com>
This commit is contained in:
Marc Mattmueller
parent
c2eabcb4e9
commit
e367bcf0c1
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@ -7,11 +7,12 @@
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# The USB hub in the HW23 connects the GNSS modem, the v2x-
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# module, the user interface and the user module.
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#
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# During the configuration/start-up the v2x module and the
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# GNSS modem are interfering. Thus a sequentialized startup
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# When HW23 device is powering up the v2x module enters DFU
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# mode. This mode leads to enumeration errors when releasing
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# the gnss module from reset. Thus a sequentialized startup
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# is needed.
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# This service just powers the USB hub and is the first
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# service needed if GNSS or in case of HW23 v2x shall work.
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# This script just sets the USB hub either into reset mode or
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# releases it from reset.
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# ************************************************************
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SCRIPT_NAME=$(basename "${0}")
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@ -32,9 +33,9 @@ export HUB_RST_STATE="off"
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function printUsage()
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{
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echo -e "\\nUsage: ${SCRIPT_NAME} [OPTIONS] HUB_STATE\\n\\n"
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echo -e " HUB_STATE The reqeusted state of the ubs hub:"
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echo -e " * on = switch hub ON"
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echo -e " * off = switch hub OFF (default)"
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echo -e " HUB_STATE The requested state of the usb hub:"
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echo -e " * on = release hub from reset"
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echo -e " * off = set hub into reset state (default)"
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echo -e " OPTIONS:"
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echo -e " -h|--help Show this help"
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echo -e ""
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@ -46,7 +47,7 @@ function printUsage()
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O=$(getopt -o h --long help -- "$@") || exit 1
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if [ $? != 0 ]; then
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echo "ERROR: Could not parse command line options"
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echo "ERROR: Could not parse $SCRIPT_NAME command line options"
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exit 1
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fi
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@ -69,21 +70,18 @@ done
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if [ ! -f $HUB_RST ]; then
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echo "ERROR: USB hub reset lines not available"
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echo "ERROR $SCRIPT_NAME: USB hub reset lines not available"
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return 1
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fi
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HUB_RST_VALUE=$OFF_VALUE
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[[ "${HUB_RST_STATE}" != "off" ]] && HUB_RST_VALUE=$ON_VALUE || true
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echo "$SCRIPT_NAME: set usb-hub=${HUB_RST_STATE}($HUB_RST_VALUE)..."
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echo $HUB_RST_VALUE > $HUB_RST
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if [[ "$?" != "0" ]]; then
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echo "ERROR: Could not set usb hub to ${HUB_RST_STATE}"
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echo "ERROR $SCRIPT_NAME: Could not set usb hub to ${HUB_RST_STATE}"
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exit 1
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fi
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# add a sleep to settle a potential off and on switching
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sleep 0.5
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exit 0
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@ -5,11 +5,7 @@ Before=gpsd.service
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[Service]
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Type=oneshot
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ExecStartPre=/usr/bin/usb-hub-reset off
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ExecStart=/usr/bin/echo releasing usb hub from reset...
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ExecStartPost=/usr/bin/usb-hub-reset on
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ExecStop=/usr/bin/echo set usb hub into reset state...
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ExecStopPost=/usr/bin/usb-hub-reset off
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ExecStart=/usr/bin/usb-hub-reset on
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RemainAfterExit=yes
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@ -5,11 +5,8 @@ After=usb-hub-reset.service v2x-ieee802.11p.service
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[Service]
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Type=oneshot
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ExecStartPre=/bin/sh -c "echo 255 > /sys/class/leds/gnss_rst/brightness && sleep 1"
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ExecStart=/usr/bin/echo releasing gnss modem from reset...
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ExecStartPost=/bin/sh -c "echo 0 > /sys/class/leds/gnss_rst/brightness"
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ExecStop=/usr/bin/echo setting gnss modem into reset...
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ExecStopPost=/bin/sh -c "echo 255 > /sys/class/leds/gnss_rst/brightness"
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ExecStartPre=/usr/bin/sh -c "/usr/bin/gnss-reset -c"
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ExecStart=/usr/bin/sh -c "/usr/bin/gnss-reset -s on"
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RemainAfterExit=yes
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@ -0,0 +1,111 @@
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#!/bin/sh
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# ************************************************************
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# GNSS Reset Script
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# -----------------------
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#
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# The USB hub in the HW23 connects the GNSS modem, the v2x-
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# module, the user interface and the user module.
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#
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# When HW23 device is powering up the v2x module enters DFU
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# mode. This mode leads to enumeration errors when releasing
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# the gnss module from reset. Thus a sequentialized startup
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# is needed.
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# This script can be called with option -c to check for a
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# specific time if the USB hub detects a disconnection of
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# the v2x module. This is needed for a proper startup of
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# the device.
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# ************************************************************
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SCRIPT_NAME=$(basename "${0}")
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SCRIPT_DIR=$(dirname "${0}")
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SCRIPT_PATH=$(realpath "${SCRIPT_DIR}")
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MYDIR=$(pwd)
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START_REASON=/sys/kernel/broker/start-reason
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GNSS_RST=/sys/class/leds/gnss_rst/brightness
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ON_VALUE=0
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OFF_VALUE=255
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CHECK_TIMEOUT_S=50
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export RST_STATE="off"
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export IS_CHECK=false
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#**********************************************************************************************
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# local helper functions
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#**********************************************************************************************
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function printUsage()
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{
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echo -e "\\nUsage: ${SCRIPT_NAME} CMD \\n\\n"
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echo -e " CMD:"
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echo -e " -c|--check Check start reason and usb-hub message"
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echo -e " -s|--set=STATE Set the requested STATE of the gnss module:"
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echo -e " * on = release module from reset"
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echo -e " * off = set module in reset mode (default)"
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echo -e " -h|--help Show this help"
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echo -e ""
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}
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function checkDeviceState()
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{
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if [ $(cat $START_REASON | grep reboot | wc -l) == 1 ]; then
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echo "$SCRIPT_NAME: Reboot, no further check necessary"
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else
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echo "$SCRIPT_NAME: Power cycle detected, checking usb hub"
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timeout $CHECK_TIMEOUT_S bash -c -- 'while true; do dmesg | grep "usb 1-1.*USB disconnect"; if [ $? == 0 ]; then break; fi; done'
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if [ $? == 124 ]; then
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echo "$SCRIPT_NAME: timed out - no reset of v2x module detected"
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fi
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fi
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}
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#**********************************************************************************************
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# main
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#**********************************************************************************************
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O=$(getopt -o hcs: --long help,check,set: -- "$@") || exit 1
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if [ $? != 0 ]; then
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echo "ERROR: Could not parse $SCRIPT_NAME command line options"
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exit 1
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fi
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eval set -- "$O"
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while true; do
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case "${1}" in
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-c|--check)
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export IS_CHECK=true
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shift
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;;
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-s|--set)
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export RST_STATE="${2}"
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shift 2
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;;
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--)
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break
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;;
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*)
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printUsage; exit 0 ;;
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esac
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done
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if [ ! -f $GNSS_RST ]; then
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echo "ERROR $SCRIPT_NAME: GNSS module reset lines not available"
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exit 1
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fi
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RST_VALUE=$OFF_VALUE
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[[ "${RST_STATE}" != "off" ]] && RST_VALUE=$ON_VALUE || true
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if [[ "${IS_CHECK}" == "true" ]]; then
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checkDeviceState
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exit 0
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fi
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echo "$SCRIPT_NAME: setting $GNSS_RST=$RST_STATE($RST_VALUE)..."
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echo $RST_VALUE > $GNSS_RST
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if [[ "$?" != 0 ]]; then
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echo "ERROR $SCRIPT_NAME: Could not set $RST_STATE ($RST_VALUE) in $GNSS_RST"
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exit 1
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fi
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exit 0
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@ -13,6 +13,7 @@ FILESEXTRAPATHS_append := ":${THISDIR}/files"
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SRC_URI_append = " \
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file://gnss-init.service \
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file://gnss-reset \
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"
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S = "${WORKDIR}"
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@ -27,4 +28,6 @@ do_install_append() {
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install -d ${D}${systemd_unitdir}/system
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install -m 644 ${WORKDIR}/gnss-init.service ${D}${systemd_unitdir}/system/
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install -d ${D}${bindir}
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install -m 744 ${WORKDIR}/gnss-reset ${D}${bindir}
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}
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